Oil strainer



FIG. 1 is a perspective view of an oil strainer showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof, a right side view being a mirror image of the left side view;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is a front view thereof in a folded configuration. 

CLAIM The ornamental design for an oil strainer, as shown and described. 